Lock-joint for wind-shields.



A. KRAH.

LOOK JOINTI'OB WIND SHIELDS.

APPLIOA'HOI FILED IAB. 4, 1912.

Patented July 2, 1912.

Q @f J sTArgEs PATENT ALEXIS man, or' NEWAHAVEN, eoNNoTIeU'i, assIGNoB 'iof'iiin ENGLISH ce' MEBsIcK co., oF NEW' HAVEN, coNNEciIcU'rg-A conroBATIoN.

LOCK-JOINT FOR D-SHIELD'S.

sp'eciaeation'or Letters rm'nt. Btgntdmjy'z, 1912 Application filed March 4, 1912. Serial 1110.881395.,`

land useful Improvement in Lock-JointsvforV Wind-Shields; and I do hereby declare the following, when taken in connection with they accompanying drawings and the characters of reference marked thereon,`tobe a full, clear, and-exact description of the saine, and which said drawings constitute'part of this application, and represent, in--.v

Figure 1 a rear view of a. lock joint constructed in accordance with my invent-ion. F1g.'2 a side view of thesame. Fig. 3 a 4front view. Fig. 4 a rear View in vertical section. Fig. 5 a side view in vertical section. Fig. -6 a perspective view of the-hubmember detached; y

This invention relates tov an improvement in lock-joints for wind shields, the object being to produce a joint which may be read-4 ily adj-usted, and whenadjusted rmly'hcld in position; and the invention consists in thel construction hereinafter described and particularly recited in the claims.

In'carrying 'out my invention, Iemploj; a stump'or casing 2 which is the fixed mem er and mounted .in the frame in any suitable Way. In this stump isa circular chamber 3' and below the chamber and opening into it is a recess et. At the upper end ofone yside offthe recess is a slight projection 5 for the purpose as will hereinafter appear; and in the opposite' side is an inwardly projecting lug or fulcrum 6. Vithin the -recess and bearing onl the fulcrum 6 is a lever 7 provided at its upperend with a hook 8 to bey engaged .by the hook-end 9 of a ring-like spring 10 which lines the chamber 3, so to speak, and has its other hook-end 11 engaged with the projection 5. 'Entered through one.

vside'. of thel casing and opening into 'the recessfi is a lthreaded hole 12 into .which is turneda thumb screw 13. As herein shown the-casing is furnished with 'a supporting l"lug *14 to provide additional bearing for the entire removal of ,the screw.

screw.' 'The inner end of the .screw bears against ,the lowerV end of the lever '7 and.

j referably, after the screw has lbeen entered. -into the casing its vinner end will be upset `foli'ngng an enlargement 15 to Vrevent the he comple- Pfromthe hub is a 44,lug 23 whic` extends through a hole 19 formed inthe bottom wall of the'chamber '3, and lone side ofjthe lug 2% is flattened as-at 20 to receive a D-col'lar 21, and the hub isI held in the casing by a screw 22. "When the screw 13 is turned outward the spring is allowed to lexl and, and when expanded ,the hub 16 may e readily inserted into l,the chambery land secured in place and the hub will be free to-turn to the desired point of adjustment. When' adjusted the screw is turned inward against the lower end of the lever 7 which turning of the fulcrum 6 willmove the upper end 8 of .the lever toward the projection and so contract the spring 10 and bind it upon the hub 16 with so much pressure as to lock the hub against movement.

I claim 1. A lock joint comprising a. casing having a circular chamber and a recess openin out of said chamber, a hub located in said chamber, a llever in said,i'ecess',"a spring surrounding the hub one end of the spring fixed to the casing, and the otherengaged with said lever, and means for moving said lever whereby the spring is contracted.

' 2. A lock joint comprising` a casing. formed with a circular chamber and with a recess opening into said chamber, a pro.- jection at one side of saidrecess, 'and a fulin said recess and bearing onsaid fulcrum, a spring within' said chamber, one .end enmentary member consists of afliub 16. which' .crum' at the oppositel side, a lever mounted gaged withthe said projectionand the-other withl the upper end o f 'said lever, a hub entered within said spring, and a screw en tering said recess and'bearing against the lower end ofthe said lever whereby the..

upper end may be moved and the .spring contracted around said hub.

Intestimony whereof, I have signed this specification in the presence of two subscribing witnesses.

I vALEXIS KRAH.

4Witnesses: 4 v

WILLIAM BRYAN, W. A.'EvANs. 

